I followed this example to enable I2C for my sensor: https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/lessons/lesson-6-serial-com-i2c/topic/exercise-1-6-2/.
However, my sensor uses 16-bit address instead of 8-bit as in the example. Can you help me to implement read/ write to 16-bit register addresses
Board: nRF53
IDE: nRF Connect SDK
int i2c_init()
{
if (!device_is_ready(dev_i2c.bus)) {
printk("I2C bus %s is not ready!\n\r",dev_i2c.bus->name);
return -1;
}
printk("I2C bus 0x%x is ready!\n\r",dev_i2c.addr);
return 0;
}
int write_to_16bit_reg(const struct i2c_dt_spec *spec, uint16_t reg_addr, const uint8_t *data, uint32_t data_length) {
uint8_t buffer[2 + data_length];
buffer[0] = (uint8_t)((reg_addr >> 8) & 0xFF); // MSB of the register address
LOG_INF("buff[0] = %x", buffer[0]);
buffer[1] = (uint8_t)(reg_addr & 0xFF); // LSB of the register address
LOG_INF("buff[1] = %x", buffer[1]);
// Copy the data to send after the address bytes
memcpy(&buffer[2], data, data_length);
// Write the buffer to the I2C device
return i2c_write_dt(spec, buffer, 2 + data_length);
}
void hm01b0_init(void)
{
int ret;
uint16_t reg_address = 0x1234; // Example register address
uint8_t data_to_write[] = {0x00}; // Example data
LOG_INF("Before write");
ret = write_to_16bit_reg(&dev_i2c, reg_address, data_to_write, sizeof(data_to_write));
LOG_INF("After write");
}
With this code I am getting the below error
I am using nRF53 board. Have configured i2c1 in overlay file. Have used default pins: SCL - P1.3 and SDA - P1.2
